r-3=-4r+7

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Solution for r-3=-4r+7 equation: 



r-3=-4r+7

We move all terms to the left:

r-3-(-4r+7)=0

We get rid of parentheses

r+4r-7-3=0

We add all the numbers together, and all the variables

5r-10=0

We move all terms containing r to the left, all other terms to the right

5r=10

r=10/5

r=2

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